torque wrench

IanON

IanON

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So I need to torque 2 bolts to 9Nm, so I don't need an excessively large wrench. Anyone have a suggestion on a specific tool I could use? Thanks.
 
IanON said:
So I need to torque 2 bolts to 9Nm, so I don't need an excessively large wrench. Anyone have a suggestion on a specific tool I could use? Thanks.
Click to expand...

How often and how much money do you wish to throw at the issue?

There are some pretty decent adjustable torque screwdrivers and wrenches out there, but they don't give them away, and the money is probably better spent elsewhere, if you do not expect this to recur a lot.

Torque is a measure of applied force times a distance. With a little work with a calculator or online conversion app, you can work out how much weight to apply to how long a torque arm, and get very good results, if a bit awkward to apply directly.

A spring scale, or other means of measuring the pull you apply to the length of the torque arm is another method.

I get 79.6 inch-pounds. 79.6 pounds on an arm of 1 inch, or 1 pound on an arm of 79.6 inches, or some combo that results in the same ratio. We were taught this stuff in classes, as we were expected to be able to properly torque fasteners, with various extensions attached to the wrench.

For all that folks diss on the spring bar type torque wrenches (as opposed to the adjustable 'click' type), the ones we had at work always passed their calibration checks every month. Check out prices at CTire and the like, and shop around. Like as not you are looking for a 1/4 inch drive torque wrench of some form.

Cheers
Trev
 
I guess the next question is what are the bolts for? With a large screwdriver 80 inch pounds is about as hard as you are able to grip and twist it... and if it is for large action screws that is enough... no torque wrench required.
 
trevj said:
How often and how much money do you wish to throw at the issue?

There are some pretty decent adjustable torque screwdrivers and wrenches out there, but they don't give them away, and the money is probably better spent elsewhere, if you do not expect this to recur a lot.

Torque is a measure of applied force times a distance. With a little work with a calculator or online conversion app, you can work out how much weight to apply to how long a torque arm, and get very good results, if a bit awkward to apply directly.

A spring scale, or other means of measuring the pull you apply to the length of the torque arm is another method.

I get 79.6 inch-pounds. 79.6 pounds on an arm of 1 inch, or 1 pound on an arm of 79.6 inches, or some combo that results in the same ratio. We were taught this stuff in classes, as we were expected to be able to properly torque fasteners, with various extensions attached to the wrench.

For all that folks diss on the spring bar type torque wrenches (as opposed to the adjustable 'click' type), the ones we had at work always passed their calibration checks every month. Check out prices at CTire and the like, and shop around. Like as not you are looking for a 1/4 inch drive torque wrench of some form.

Cheers
Trev
Click to expand...

Very true...the Beam torque wrenches remain in spec longer that the 'spring loaded' Click type. Anschutz made (makes?) a small Click type torque wrench for action screws that would cover the range...but they are beautifully made and were pricey 20 years ago!
 
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